Nah, this is not the first G-Shock with an HRM. This is only the first in the "G-LIDE" series designed for surfers which usually has a tide graph. But there have been Wear OS G-Shocks and G-Move watches with HRM in the past.

looks neat, but this would stop my buy:

""" Use USB charging for the heart rate monitor, step tracker and notifications. Time display is powered by solar charging alone when the battery runs low. """

I have a gshock already (GM-B2100D-1A) and I love it - I especially love that it should never be opened, always just works, and it looks ok too (: